Ring-shaped light source



FIG. 1 is a perspective view of an embodiment of a ring-shaped light source showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a perspective view of the ring-shaped light source shown in use as a light source of a lamp.

The broken lines are for the purposes of illustration portions of the ring-shaped light source and form no part of the claimed design. 

CLAIM The ornamental design for a ring-shaped light source, as shown and described. 